/* =======================================================================
   utilities.css — Utility Classes, Gradients, Color Helpers, Layout
   Advanced Solar Load Calculator — Production CSS Architecture
   ======================================================================= */

/* ── Display ───────────────────────────────────────────────────────── */
.hidden  { display: none !important; }
.block   { display: block; }
.flex    { display: flex; }
.inline  { display: inline; }
.grid    { display: grid; }

/* ── Flex utilities ────────────────────────────────────────────────── */
.flex-col      { flex-direction: column; }
.flex-row      { flex-direction: row; }
.flex-wrap     { flex-wrap: wrap; }
.items-center  { align-items: center; }
.items-start   { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.justify-end     { justify-content: flex-end; }
.gap-1 { gap: var(--sp-1); }
.gap-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.flex-1 { flex: 1; }
.shrink-0 { flex-shrink: 0; }
.min-w-0 { min-width: 0; }

/* ── Spacing ───────────────────────────────────────────────────────── */
.p-0  { padding: 0; }
.p-1  { padding: var(--sp-1); }
.p-2  { padding: var(--sp-2); }
.p-3  { padding: var(--sp-3); }
.p-4  { padding: var(--sp-4); }
.p-5  { padding: var(--sp-5); }
.p-6  { padding: var(--sp-6); }

.px-2 { padding-left: var(--sp-2); padding-right: var(--sp-2); }
.px-3 { padding-left: var(--sp-3); padding-right: var(--sp-3); }
.px-4 { padding-left: var(--sp-4); padding-right: var(--sp-4); }
.px-6 { padding-left: var(--sp-6); padding-right: var(--sp-6); }

.py-1 { padding-top: var(--sp-1); padding-bottom: var(--sp-1); }
.py-2 { padding-top: var(--sp-2); padding-bottom: var(--sp-2); }
.py-3 { padding-top: var(--sp-3); padding-bottom: var(--sp-3); }
.py-4 { padding-top: var(--sp-4); padding-bottom: var(--sp-4); }

.m-0   { margin: 0; }
.mt-1  { margin-top: var(--sp-1); }
.mt-2  { margin-top: var(--sp-2); }
.mt-3  { margin-top: var(--sp-3); }
.mt-4  { margin-top: var(--sp-4); }
.mb-1  { margin-bottom: var(--sp-1); }
.mb-2  { margin-bottom: var(--sp-2); }
.mb-3  { margin-bottom: var(--sp-3); }
.mb-4  { margin-bottom: var(--sp-4); }

/* ── Typography ────────────────────────────────────────────────────── */
.text-xs   { font-size: var(--fs-xs); }
.text-sm   { font-size: var(--fs-sm); }
.text-base { font-size: var(--fs-base); }
.text-md   { font-size: var(--fs-md); }
.text-lg   { font-size: var(--fs-lg); }
.text-xl   { font-size: var(--fs-xl); }
.text-2xl  { font-size: var(--fs-2xl); }
.text-3xl  { font-size: var(--fs-3xl); }

.font-normal    { font-weight: 400; }
.font-medium    { font-weight: 500; }
.font-semibold  { font-weight: 600; }
.font-bold      { font-weight: 700; }
.font-black     { font-weight: 900; }

.text-center { text-align: center; }
.text-right  { text-align: right; }
.text-left   { text-align: left; }

.tracking-wider { letter-spacing: 0.05em; }
.uppercase      { text-transform: uppercase; }
.truncate       { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.leading-snug   { line-height: 1.375; }
.leading-relaxed { line-height: var(--lh-relaxed); }

/* ── Width ─────────────────────────────────────────────────────────── */
.w-full { width: 100%; }
.w-fit  { width: fit-content; }
.max-w-content { max-width: var(--max-content); }

/* ── Overflow ──────────────────────────────────────────────────────── */
.overflow-hidden { overflow: hidden; }
.overflow-auto   { overflow: auto; }
.overflow-y-auto { overflow-y: auto; }
.overflow-x-auto { overflow-x: auto; }

/* ── Position ──────────────────────────────────────────────────────── */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed    { position: fixed; }
.sticky   { position: sticky; }

/* ── Border ────────────────────────────────────────────────────────── */
.border     { border: 1px solid var(--border); }
.border-2   { border: 1px solid var(--border-2); }
.border-b   { border-bottom: 1px solid var(--border); }
.border-t   { border-top: 1px solid var(--border); }
.border-l   { border-left: 1px solid var(--border); }
.border-r   { border-right: 1px solid var(--border); }
.rounded    { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* ── Cursor ────────────────────────────────────────────────────────── */
.cursor-pointer { cursor: pointer; }
.cursor-text    { cursor: text; }

/* ── Opacity ───────────────────────────────────────────────────────── */
.opacity-0   { opacity: 0; }
.opacity-50  { opacity: 0.5; }
.opacity-60  { opacity: 0.6; }
.opacity-80  { opacity: 0.8; }
.opacity-100 { opacity: 1; }

/* ── Transition ────────────────────────────────────────────────────── */
.transition     { transition: all var(--transition-base); }
.transition-fast { transition: all var(--transition-fast); }

/* ── Gradients ─────────────────────────────────────────────────────── */
.gradient-accent {
  background: linear-gradient(to left, var(--accent), var(--solar));
}

.gradient-hero {
  background: linear-gradient(to bottom left, var(--panel), var(--bg-2), var(--bg));
}

/* ── Background color with opacity (common Tailwind replacements) ──── */
.bg-orange-500\/5  { background-color: rgba(249,115,22,0.05); }
.bg-orange-500\/10 { background-color: rgba(249,115,22,0.1); }
.bg-orange-500\/15 { background-color: rgba(249,115,22,0.15); }
.bg-orange-500\/20 { background-color: rgba(249,115,22,0.2); }
.bg-orange-500\/30 { background-color: rgba(249,115,22,0.3); }

.bg-amber-500\/5   { background-color: rgba(245,158,11,0.05); }
.bg-amber-500\/10  { background-color: rgba(245,158,11,0.1); }
.bg-amber-500\/15  { background-color: rgba(245,158,11,0.15); }
.bg-amber-500\/20  { background-color: rgba(245,158,11,0.2); }
.bg-amber-500\/30  { background-color: rgba(245,158,11,0.3); }

.bg-emerald-500\/5  { background-color: rgba(16,185,129,0.05); }
.bg-emerald-500\/10 { background-color: rgba(16,185,129,0.1); }
.bg-emerald-500\/15 { background-color: rgba(16,185,129,0.15); }
.bg-emerald-500\/20 { background-color: rgba(16,185,129,0.2); }
.bg-emerald-500\/30 { background-color: rgba(16,185,129,0.3); }

.bg-blue-500\/5   { background-color: rgba(59,130,246,0.05); }
.bg-blue-500\/10  { background-color: rgba(59,130,246,0.1); }
.bg-blue-500\/15  { background-color: rgba(59,130,246,0.15); }
.bg-blue-500\/20  { background-color: rgba(59,130,246,0.2); }

.bg-red-500\/5    { background-color: rgba(239,68,68,0.05); }
.bg-red-500\/10   { background-color: rgba(239,68,68,0.1); }
.bg-red-500\/15   { background-color: rgba(239,68,68,0.15); }
.bg-red-500\/20   { background-color: rgba(239,68,68,0.2); }
.bg-red-500\/30   { background-color: rgba(239,68,68,0.3); }

.bg-pink-500\/5   { background-color: rgba(236,72,153,0.05); }
.bg-pink-500\/10  { background-color: rgba(236,72,153,0.1); }
.bg-pink-500\/20  { background-color: rgba(236,72,153,0.2); }
.bg-pink-500\/30  { background-color: rgba(236,72,153,0.3); }

.bg-violet-500\/5  { background-color: rgba(139,92,246,0.05); }
.bg-violet-500\/10 { background-color: rgba(139,92,246,0.1); }
.bg-violet-500\/20 { background-color: rgba(139,92,246,0.2); }
.bg-violet-500\/30 { background-color: rgba(139,92,246,0.3); }

.bg-cyan-500\/5   { background-color: rgba(6,182,212,0.05); }
.bg-cyan-500\/10  { background-color: rgba(6,182,212,0.1); }
.bg-cyan-500\/20  { background-color: rgba(6,182,212,0.2); }
.bg-cyan-500\/30  { background-color: rgba(6,182,212,0.3); }

.bg-purple-500\/10 { background-color: rgba(168,85,247,0.1); }
.bg-purple-500\/20 { background-color: rgba(168,85,247,0.2); }
.bg-purple-500\/30 { background-color: rgba(168,85,247,0.3); }

.bg-indigo-500\/10 { background-color: rgba(99,102,241,0.1); }
.bg-indigo-500\/20 { background-color: rgba(99,102,241,0.2); }

.bg-yellow-500\/10 { background-color: rgba(234,179,8,0.1); }
.bg-yellow-500\/20 { background-color: rgba(234,179,8,0.2); }

.bg-rose-500\/10 { background-color: rgba(244,63,94,0.1); }
.bg-rose-500\/20 { background-color: rgba(244,63,94,0.2); }

.bg-sky-500\/10  { background-color: rgba(14,165,233,0.1); }
.bg-sky-500\/20  { background-color: rgba(14,165,233,0.2); }

.bg-fuchsia-500\/10 { background-color: rgba(217,70,239,0.1); }
.bg-fuchsia-500\/20 { background-color: rgba(217,70,239,0.2); }

.bg-slate-500\/10 { background-color: rgba(100,116,139,0.1); }
.bg-slate-500\/20 { background-color: rgba(100,116,139,0.2); }
.bg-slate-500\/40 { background-color: rgba(100,116,139,0.4); }

.bg-slate-800\/30 { background-color: rgba(30,41,59,0.3); }
.bg-slate-800\/40 { background-color: rgba(30,41,59,0.4); }
.bg-slate-800\/60 { background-color: rgba(30,41,59,0.6); }
.bg-slate-800\/80 { background-color: rgba(30,41,59,0.8); }

.bg-slate-900\/30 { background-color: rgba(15,23,42,0.3); }
.bg-slate-900\/40 { background-color: rgba(15,23,42,0.4); }
.bg-slate-900\/50 { background-color: rgba(15,23,42,0.5); }
.bg-slate-900\/80 { background-color: rgba(15,23,42,0.8); }

/* ── Border color with opacity ─────────────────────────────────────── */
.border-orange-500\/20 { border-color: rgba(249,115,22,0.2); }
.border-orange-500\/30 { border-color: rgba(249,115,22,0.3); }
.border-orange-500\/40 { border-color: rgba(249,115,22,0.4); }
.border-orange-500\/50 { border-color: rgba(249,115,22,0.5); }
.border-amber-500\/20  { border-color: rgba(245,158,11,0.2); }
.border-amber-500\/30  { border-color: rgba(245,158,11,0.3); }
.border-amber-500\/50  { border-color: rgba(245,158,11,0.5); }
.border-emerald-500\/20 { border-color: rgba(16,185,129,0.2); }
.border-emerald-500\/30 { border-color: rgba(16,185,129,0.3); }
.border-emerald-500\/40 { border-color: rgba(16,185,129,0.4); }
.border-blue-500\/20   { border-color: rgba(59,130,246,0.2); }
.border-blue-500\/30   { border-color: rgba(59,130,246,0.3); }
.border-red-500\/20    { border-color: rgba(239,68,68,0.2); }
.border-red-500\/30    { border-color: rgba(239,68,68,0.3); }
.border-red-500\/50    { border-color: rgba(239,68,68,0.5); }
.border-pink-500\/20   { border-color: rgba(236,72,153,0.2); }
.border-pink-500\/30   { border-color: rgba(236,72,153,0.3); }
.border-violet-500\/20 { border-color: rgba(139,92,246,0.2); }
.border-violet-500\/30 { border-color: rgba(139,92,246,0.3); }
.border-cyan-500\/20   { border-color: rgba(6,182,212,0.2); }
.border-cyan-500\/30   { border-color: rgba(6,182,212,0.3); }
.border-purple-500\/30 { border-color: rgba(168,85,247,0.3); }
.border-indigo-500\/20 { border-color: rgba(99,102,241,0.2); }
.border-yellow-500\/20 { border-color: rgba(234,179,8,0.2); }
.border-rose-500\/20   { border-color: rgba(244,63,94,0.2); }
.border-sky-500\/20    { border-color: rgba(14,165,233,0.2); }
.border-fuchsia-500\/20 { border-color: rgba(217,70,239,0.2); }
.border-slate-500\/30  { border-color: rgba(100,116,139,0.3); }
.border-slate-800\/40  { border-color: rgba(30,41,59,0.4); }
.border-slate-800\/50  { border-color: rgba(30,41,59,0.5); }
.border-slate-800\/80  { border-color: rgba(30,41,59,0.8); }

/* ── Gradient classes ──────────────────────────────────────────────── */
.bg-gradient-to-r  { background-image: linear-gradient(to left, var(--tw-gradient-stops)); }
.bg-gradient-to-l  { background-image: linear-gradient(to right, var(--tw-gradient-stops)); }
.bg-gradient-to-br { background-image: linear-gradient(to top left, var(--tw-gradient-stops)); }
.bg-gradient-to-bl { background-image: linear-gradient(to top right, var(--tw-gradient-stops)); }

.from-orange-500  { --tw-gradient-from: #f97316; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to); }
.from-amber-500   { --tw-gradient-from: #f59e0b; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to); }
.from-emerald-500 { --tw-gradient-from: #10b981; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to); }
.from-blue-500    { --tw-gradient-from: #3b82f6; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to); }
.from-red-500     { --tw-gradient-from: #ef4444; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to); }
.from-pink-500    { --tw-gradient-from: #ec4899; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to); }
.from-violet-500  { --tw-gradient-from: #8b5cf6; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to); }
.from-cyan-500    { --tw-gradient-from: #06b6d4; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to); }
.from-indigo-500  { --tw-gradient-from: #6366f1; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to); }
.from-yellow-500  { --tw-gradient-from: #eab308; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to); }

.to-orange-500  { --tw-gradient-to: #f97316; }
.to-amber-500   { --tw-gradient-to: #f59e0b; }
.to-amber-400   { --tw-gradient-to: #fbbf24; }
.to-emerald-500 { --tw-gradient-to: #10b981; }
.to-blue-500    { --tw-gradient-to: #3b82f6; }
.to-blue-600    { --tw-gradient-to: #2563eb; }
.to-red-500     { --tw-gradient-to: #ef4444; }
.to-pink-500    { --tw-gradient-to: #ec4899; }
.to-violet-500  { --tw-gradient-to: #8b5cf6; }
.to-cyan-500    { --tw-gradient-to: #06b6d4; }
.to-indigo-500  { --tw-gradient-to: #6366f1; }
.to-slate-800   { --tw-gradient-to: #1e293b; }

/* ── Fill colors for SVG/Chart.js ───────────────────────────────────── */
.fill-orange-500  { fill: #f97316; }
.fill-amber-500   { fill: #f59e0b; }
.fill-emerald-500 { fill: #10b981; }
.fill-blue-500    { fill: #3b82f6; }
.fill-red-500     { fill: #ef4444; }
.fill-pink-500    { fill: #ec4899; }
.fill-violet-500  { fill: #8b5cf6; }
.fill-cyan-500    { fill: #06b6d4; }
.fill-purple-500  { fill: #a855f7; }
.fill-indigo-500  { fill: #6366f1; }
.fill-yellow-500  { fill: #eab308; }
.fill-slate-500   { fill: #64748b; }
.fill-slate-700   { fill: #334155; }

/* ── Stroke colors ─────────────────────────────────────────────────── */
.stroke-orange-500  { stroke: #f97316; }
.stroke-amber-500   { stroke: #f59e0b; }
.stroke-emerald-500 { stroke: #10b981; }
.stroke-blue-500    { stroke: #3b82f6; }
.stroke-pink-500    { stroke: #ec4899; }
.stroke-violet-500  { stroke: #8b5cf6; }
.stroke-cyan-500    { stroke: #06b6d4; }
.stroke-red-500     { stroke: #ef4444; }

/* ── Shadow utilities ──────────────────────────────────────────────── */
.shadow-lg-orange { box-shadow: 0 4px 14px rgba(255,106,0,0.3); }
.shadow-md       { box-shadow: var(--shadow-md); }

/* ── Select none ───────────────────────────────────────────────────── */
.select-none { user-select: none; }

/* ── Z-index ───────────────────────────────────────────────────────── */
.z-10 { z-index: 10; }
.z-50 { z-index: 50; }

/* ── Space-y (vertical spacing) ────────────────────────────────────── */
.space-y-1 > * + * { margin-top: var(--sp-1); }
.space-y-2 > * + * { margin-top: var(--sp-2); }
.space-y-3 > * + * { margin-top: var(--sp-3); }
.space-y-4 > * + * { margin-top: var(--sp-4); }
.space-y-5 > * + * { margin-top: var(--sp-5); }
.space-y-6 > * + * { margin-top: var(--sp-6); }

/* ── Space-x (horizontal spacing) ──────────────────────────────────── */
.space-x-1 > * + * { margin-left: var(--sp-1); }
.space-x-2 > * + * { margin-left: var(--sp-2); }
.space-x-3 > * + * { margin-left: var(--sp-3); }

/* ── Max-width presets ─────────────────────────────────────────────── */
.max-w-sm   { max-width: 24rem; }
.max-w-md   { max-width: 28rem; }
.max-w-lg   { max-width: 32rem; }
.max-w-xl   { max-width: 36rem; }
.max-w-2xl  { max-width: 42rem; }
.max-w-3xl  { max-width: 48rem; }
.max-w-4xl  { max-width: 56rem; }
.max-w-5xl  { max-width: 64rem; }

/* ── Col span ──────────────────────────────────────────────────────── */
.col-span-full { grid-column: 1 / -1; }

/* ── Divide ────────────────────────────────────────────────────────── */
.divide-y > * + * { border-top: 1px solid var(--border); }
.divide-y > * + * { border-top-width: 1px; }
.divide-slate-800\/50 > * + * { border-color: rgba(30,41,59,0.5); }

/* ── View-specific grids (from original React) ─────────────────────── */
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
  .lg\:col-span-2  { grid-column: span 2; }
  .lg\:col-span-3  { grid-column: span 3; }
}

@media (min-width: 1280px) {
  .xl\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .xl\:col-span-2  { grid-column: span 2; }
}

/* ── Hover states for interactive elements ──────────────────────────── */
.hover\:border-orange-500\/30:hover { border-color: rgba(249,115,22,0.3); }
.hover\:border-orange-500\/50:hover { border-color: rgba(249,115,22,0.5); }
.hover\:bg-slate-800\/40:hover     { background-color: rgba(30,41,59,0.4); }
.hover\:bg-slate-800\/60:hover     { background-color: rgba(30,41,59,0.6); }
.hover\:bg-slate-700\/60:hover     { background-color: rgba(51,65,85,0.6); }
.hover\:bg-red-500\/20:hover       { background-color: rgba(239,68,68,0.2); }
.hover\:text-orange-300:hover      { color: #fdba74; }
.hover\:text-slate-200:hover       { color: #e2e8f0; }
.hover\:shadow-orange-500\/50:hover { box-shadow: 0 6px 20px rgba(255,106,0,0.5); }

/* ── Disabled state ────────────────────────────────────────────────── */
.disabled\:opacity-50:disabled      { opacity: 0.5; }
.disabled\:cursor-not-allowed:disabled { cursor: not-allowed; }